3 lines
11 KiB
JavaScript
3 lines
11 KiB
JavaScript
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"use strict";class e{static get version(){return"1.4.0"}static toString(){return"JavaScript Expression Parser (JSEP) v"+e.version}static addUnaryOp(t){return e.max_unop_len=Math.max(t.length,e.max_unop_len),e.unary_ops[t]=1,e}static addBinaryOp(t,r,i){return e.max_binop_len=Math.max(t.length,e.max_binop_len),e.binary_ops[t]=r,i?e.right_associative.add(t):e.right_associative.delete(t),e}static addIdentifierChar(t){return e.additional_identifier_chars.add(t),e}static addLiteral(t,r){return e.literals[t]=r,e}static removeUnaryOp(t){return delete e.unary_ops[t],t.length===e.max_unop_len&&(e.max_unop_len=e.getMaxKeyLen(e.unary_ops)),e}static removeAllUnaryOps(){return e.unary_ops={},e.max_unop_len=0,e}static removeIdentifierChar(t){return e.additional_identifier_chars.delete(t),e}static removeBinaryOp(t){return delete e.binary_ops[t],t.length===e.max_binop_len&&(e.max_binop_len=e.getMaxKeyLen(e.binary_ops)),e.right_associative.delete(t),e}static removeAllBinaryOps(){return e.binary_ops={},e.max_binop_len=0,e}static removeLiteral(t){return delete e.literals[t],e}static removeAllLiterals(){return e.literals={},e}get char(){return this.expr.charAt(this.index)}get code(){return this.expr.charCodeAt(this.index)}constructor(e){this.expr=e,this.index=0}static parse(t){return new e(t).parse()}static getMaxKeyLen(e){return Math.max(0,...Object.keys(e).map((e=>e.length)))}static isDecimalDigit(e){return e>=48&&e<=57}static binaryPrecedence(t){return e.binary_ops[t]||0}static isIdentifierStart(t){return t>=65&&t<=90||t>=97&&t<=122||t>=128&&!e.binary_ops[String.fromCharCode(t)]||e.additional_identifier_chars.has(String.fromCharCode(t))}static isIdentifierPart(t){return e.isIdentifierStart(t)||e.isDecimalDigit(t)}throwError(e){const t=new Error(e+" at character "+this.index);throw t.index=this.index,t.description=e,t}runHook(t,r){if(e.hooks[t]){const i={context:this,node:r};return e.hooks.run(t,i),i.node}return r}searchHook(t){if(e.hooks[t]){const r={context:this};return e.hooks[t].find((function(e){return e.call(r.context,r),r.node})),r.node}}gobbleSpaces(){let t=this.code;for(;t===e.SPACE_CODE||t===e.TAB_CODE||t===e.LF_CODE||t===e.CR_CODE;)t=this.expr.charCodeAt(++this.index);this.runHook("gobble-spaces")}parse(){this.runHook("before-all");const t=this.gobbleExpressions(),r=1===t.length?t[0]:{type:e.COMPOUND,body:t};return this.runHook("after-all",r)}gobbleExpressions(t){let r,i,s=[];for(;this.index<this.expr.length;)if(r=this.code,r===e.SEMCOL_CODE||r===e.COMMA_CODE)this.index++;else if(i=this.gobbleExpression())s.push(i);else if(this.index<this.expr.length){if(r===t)break;this.throwError('Unexpected "'+this.char+'"')}return s}gobbleExpression(){const e=this.searchHook("gobble-expression")||this.gobbleBinaryExpression();return this.gobbleSpaces(),this.runHook("after-expression",e)}gobbleBinaryOp(){this.gobbleSpaces();let t=this.expr.substr(this.index,e.max_binop_len),r=t.length;for(;r>0;){if(e.binary_ops.hasOwnProperty(t)&&(!e.isIdentifierStart(this.code)||this.index+t.length<this.expr.length&&!e.isIdentifierPart(this.expr.charCodeAt(this.index+t.length))))return this.index+=r,t;t=t.substr(0,--r)}return!1}gobbleBinaryExpression(){let t,r,i,s,n,o,h,a,l;if(o=this.gobbleToken(),!o)return o;if(r=this.gobbleBinaryOp(),!r)return o;for(n={value:r,prec:e.binaryPrecedence(r),right_a:e.right_associative.has(r)},h=this.gobbleToken(),h||this.throwError("Expected expression after "+r),s=[o,n,h];r=this.gobbleBinaryOp();){if(i=e.binaryPrecedence(r),0===i){this.index-=r.length;break}n={value:r,prec:i,right_a:e.right_associative.has(r)},l=r;const a=e=>n.right_a&&e.right_a?i>e.prec:i<=e.prec;for(;s.length>2&&a(s[s.length-2]);)h=s.pop(),r=s.pop().value,o=s.pop(),t={type:e.BINARY_EXP,operator:r,left:o,right:h},s.push(t);t=this.gobbleToken(),t||this.throwError("Expected expression after "+l),s.push(n,t)}for(a=s.length-1,t=s[a];a>1;)t={type:e.BINARY_EXP,operator:s[a-1].value,left:s[a-2],right:t},a-=2;return t}gobbleToken(){let t,r,i,s;if(this.gobbleSpaces(),s=this.searchHook("gobble-token"),s)return this.runHook("after-token",s);if(t=this.code,e.isDecimalD
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